76 . The average of 5 quantities is 6 . The average of 3 of them is 8 . What is the average of the remaining two numbers ?
  • A. 6.5
  • B. 4
  • C. 3
  • D. 3.5
  • E. None of these
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77 . The average of 7 numbers is 12. After discarding one number, the average becomes 11. What is the discarded number?
  • A. 7
  • B. 10
  • C. 18
  • D. 12
  • E. 15
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78 . The average of 7 numbers of 40. If 3 more numbers with an average of 21 are added to these numbers,what will be the average of the combined 10 numbers?
  • A. 6.1
  • B. 30.1
  • C. 30.3
  • D. 34.3
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79 . The average of a non-zero number and its square is 5times the number. The number is-
  • A. 9
  • B. 17
  • C. 29
  • D. 295
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পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪
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80 . The average of four consecutive odd positive integers is always.
  • A. an odd number
  • B. divisible by 4
  • C. an even number
  • D. both (B) and (C)
  • E. None of them
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81 . The average of the two-digit numbers, which remain the same when the digits interchange their positions , is :
  • A. 33
  • B. 44
  • C. 55
  • D. 66
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82 . The average of x and another number is z. the other number must be ----
  • A. z-x
  • B. (z+x)/2
  • C. 2z-x
  • D. none of these
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83 . The average weight for a group of 20 women is 130 pounds. If the average weight for 75% of these women was 140 pounds, what was the average weight in pounds for the rest of the women?
  • A. 100
  • B. 110
  • C. 120
  • D. 135
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84 . The average weight of 3 friends is 33 kg. None of the friends weights less than 31 kg . What can be the maximum weight of any three friends ?
  • A. 37
  • B. 35
  • C. 33
  • D. 32
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85 . The cost function of a product is 400 + 2x, where x is the number of units produced. How many units should be produced to make an average cost of TK. 2.5 per unit ?
  • A. 200
  • B. 800
  • C. 400
  • D. 720
  • E. 900
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86 . The electric company charges Tk. 0.30 per kilowatt-hour (KWH). Rahim used 2800 KWH in April, 3200 KWH in May, and 3600 KWH in June. What was his average cost of electricity for the 3 months?
  • A. Tk. 72
  • B. Tk. 96
  • C. Tk. 48
  • D. Tk. 144
  • E. None of these
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87 . Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?
  • A. 81
  • B. 81.5
  • C. 82
  • D. 84.5
  • E. None of these
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88 . X's marks are 70, 90, 65, 85 and 75. What marks he must get on the next test to raise her average to 80 ?
  • A. 80
  • B. 85
  • C. 90
  • D. 95
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89 . Your company has an advertisement budget of BDT 50 million per quarter. Accounts show that during the first three quarters the company has spent BDT 10, 15, and 20 million respectively. How much should the company spend during the fourth quarter in order to maintain the average budget allocation?
  • A. 10 million
  • B. 5 million
  • C. 250 million
  • D. 155 million
  • E. None of these
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